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* drivers/staging/omapdrm/omap_fb.c
*
* Copyright (C) 2011 Texas Instruments
* Author: Rob Clark <rob@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "omap_drv.h"
#include "drm_crtc.h"
#include "drm_crtc_helper.h"
/*
* framebuffer funcs
*/
/* per-format info: */
struct format {
enum omap_color_mode dss_format;
uint32_t pixel_format;
struct {
int stride_bpp; /* this times width is stride */
int sub_y; /* sub-sample in y dimension */
} planes[4];
bool yuv;
};
static const struct format formats[] = {
/* 16bpp [A]RGB: */
{ OMAP_DSS_COLOR_RGB16, DRM_FORMAT_RGB565, {{2, 1}}, false }, /* RGB16-565 */
{ OMAP_DSS_COLOR_RGB12U, DRM_FORMAT_RGBX4444, {{2, 1}}, false }, /* RGB12x-4444 */
{ OMAP_DSS_COLOR_RGBX16, DRM_FORMAT_XRGB4444, {{2, 1}}, false }, /* xRGB12-4444 */
{ OMAP_DSS_COLOR_RGBA16, DRM_FORMAT_RGBA4444, {{2, 1}}, false }, /* RGBA12-4444 */
{ OMAP_DSS_COLOR_ARGB16, DRM_FORMAT_ARGB4444, {{2, 1}}, false }, /* ARGB16-4444 */
{ OMAP_DSS_COLOR_XRGB16_1555, DRM_FORMAT_XRGB1555, {{2, 1}}, false }, /* xRGB15-1555 */
{ OMAP_DSS_COLOR_ARGB16_1555, DRM_FORMAT_ARGB1555, {{2, 1}}, false }, /* ARGB16-1555 */
/* 24bpp RGB: */
{ OMAP_DSS_COLOR_RGB24P, DRM_FORMAT_RGB888, {{3, 1}}, false }, /* RGB24-888 */
/* 32bpp [A]RGB: */
{ OMAP_DSS_COLOR_RGBX32, DRM_FORMAT_RGBX8888, {{4, 1}}, false }, /* RGBx24-8888 */
{ OMAP_DSS_COLOR_RGB24U, DRM_FORMAT_XRGB8888, {{4, 1}}, false }, /* xRGB24-8888 */
{ OMAP_DSS_COLOR_RGBA32, DRM_FORMAT_RGBA8888, {{4, 1}}, false }, /* RGBA32-8888 */
{ OMAP_DSS_COLOR_ARGB32, DRM_FORMAT_ARGB8888, {{4, 1}}, false }, /* ARGB32-8888 */
/* YUV: */
{ OMAP_DSS_COLOR_NV12, DRM_FORMAT_NV12, {{1, 1}, {1, 2}}, true },
{ OMAP_DSS_COLOR_YUV2, DRM_FORMAT_YUYV, {{2, 1}}, true },
{ OMAP_DSS_COLOR_UYVY, DRM_FORMAT_UYVY, {{2, 1}}, true },
};
/* convert from overlay's pixel formats bitmask to an array of fourcc's */
uint32_t omap_framebuffer_get_formats(uint32_t *pixel_formats,
uint32_t max_formats, enum omap_color_mode supported_modes)
{
uint32_t nformats = 0;
int i = 0;
for (i = 0; i < ARRAY_SIZE(formats) && nformats < max_formats; i++)
if (formats[i].dss_format & supported_modes)
pixel_formats[nformats++] = formats[i].pixel_format;
return nformats;
}
/* per-plane info for the fb: */
struct plane {
struct drm_gem_object *bo;
uint32_t pitch;
uint32_t offset;
dma_addr_t paddr;
};
#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
struct omap_framebuffer {
struct drm_framebuffer base;
const struct format *format;
struct plane planes[4];
};
static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
struct drm_file *file_priv,
unsigned int *handle)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
return drm_gem_handle_create(file_priv,
omap_fb->planes[0].bo, handle);
}
static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
int i, n = drm_format_num_planes(fb->pixel_format);
DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
drm_framebuffer_cleanup(fb);
for (i = 0; i < n; i++) {
struct plane *plane = &omap_fb->planes[i];
if (plane->bo)
drm_gem_object_unreference_unlocked(plane->bo);
}
kfree(omap_fb);
}
static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
struct drm_file *file_priv, unsigned flags, unsigned color,
struct drm_clip_rect *clips, unsigned num_clips)
{
int i;
for (i = 0; i < num_clips; i++) {
omap_framebuffer_flush(fb, clips[i].x1, clips[i].y1,
clips[i].x2 - clips[i].x1,
clips[i].y2 - clips[i].y1);
}
return 0;
}
static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
.create_handle = omap_framebuffer_create_handle,
.destroy = omap_framebuffer_destroy,
.dirty = omap_framebuffer_dirty,
};
/* update ovl info for scanout, handles cases of multi-planar fb's, etc.
*/
void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, int x, int y,
struct omap_overlay_info *info)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
const struct format *format = omap_fb->format;
struct plane *plane = &omap_fb->planes[0];
unsigned int offset;
offset = plane->offset +
(x * format->planes[0].stride_bpp) +
(y * plane->pitch / format->planes[0].sub_y);
info->color_mode = format->dss_format;
info->paddr = plane->paddr + offset;
info->screen_width = plane->pitch / format->planes[0].stride_bpp;
if (format->dss_format == OMAP_DSS_COLOR_NV12) {
plane = &omap_fb->planes[1];
offset = plane->offset +
(x * format->planes[1].stride_bpp) +
(y * plane->pitch / format->planes[1].sub_y);
info->p_uv_addr = plane->paddr + offset;
} else {
info->p_uv_addr = 0;
}
}
/* Call for unpin 'a' (if not NULL), and pin 'b' (if not NULL). Although
* buffers to unpin are just just pushed to the unpin fifo so that the
* caller can defer unpin until vblank.
*
* Note if this fails (ie. something went very wrong!), all buffers are
* unpinned, and the caller disables the overlay. We could have tried
* to revert back to the previous set of pinned buffers but if things are
* hosed there is no guarantee that would succeed.
*/
int omap_framebuffer_replace(struct drm_framebuffer *a,
struct drm_framebuffer *b, void *arg,
void (*unpin)(void *arg, struct drm_gem_object *bo))
{
int ret = 0, i, na, nb;
struct omap_framebuffer *ofba = to_omap_framebuffer(a);
struct omap_framebuffer *ofbb = to_omap_framebuffer(b);
na = a ? drm_format_num_planes(a->pixel_format) : 0;
nb = b ? drm_format_num_planes(b->pixel_format) : 0;
for (i = 0; i < max(na, nb); i++) {
struct plane *pa, *pb;
pa = (i < na) ? &ofba->planes[i] : NULL;
pb = (i < nb) ? &ofbb->planes[i] : NULL;
if (pa) {
unpin(arg, pa->bo);
pa->paddr = 0;
}
if (pb && !ret)
ret = omap_gem_get_paddr(pb->bo, &pb->paddr, true);
}
if (ret) {
/* something went wrong.. unpin what has been pinned */
for (i = 0; i < nb; i++) {
struct plane *pb = &ofba->planes[i];
if (pb->paddr) {
unpin(arg, pb->bo);
pb->paddr = 0;
}
}
}
return ret;
}
struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
if (p >= drm_format_num_planes(fb->pixel_format))
return NULL;
return omap_fb->planes[p].bo;
}
/* iterate thru all the connectors, returning ones that are attached
* to the same fb..
*/
struct drm_connector *omap_framebuffer_get_next_connector(
struct drm_framebuffer *fb, struct drm_connector *from)
{
struct drm_device *dev = fb->dev;
struct list_head *connector_list = &dev->mode_config.connector_list;
struct drm_connector *connector = from;
if (!from) {
return list_first_entry(connector_list, typeof(*from), head);
}
list_for_each_entry_from(connector, connector_list, head) {
if (connector != from) {
struct drm_encoder *encoder = connector->encoder;
struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
if (crtc && crtc->fb == fb) {
return connector;
}
}
}
return NULL;
}
/* flush an area of the framebuffer (in case of manual update display that
* is not automatically flushed)
*/
void omap_framebuffer_flush(struct drm_framebuffer *fb,
int x, int y, int w, int h)
{
struct drm_connector *connector = NULL;
VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
/* only consider connectors that are part of a chain */
if (connector->encoder && connector->encoder->crtc) {
/* TODO: maybe this should propagate thru the crtc who
* could do the coordinate translation..
*/
struct drm_crtc *crtc = connector->encoder->crtc;
int cx = max(0, x - crtc->x);
int cy = max(0, y - crtc->y);
int cw = w + (x - crtc->x) - cx;
int ch = h + (y - crtc->y) - cy;
omap_connector_flush(connector, cx, cy, cw, ch);
}
}
}
#ifdef CONFIG_DEBUG_FS
void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
{
struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
int i, n = drm_format_num_planes(fb->pixel_format);
seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
(char *)&fb->pixel_format);
for (i = 0; i < n; i++) {
struct plane *plane = &omap_fb->planes[i];
seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
i, plane->offset, plane->pitch);
omap_gem_describe(plane->bo, m);
}
}
#endif
struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
{
struct drm_gem_object *bos[4];
struct drm_framebuffer *fb;
int ret;
ret = objects_lookup(dev, file, mode_cmd->pixel_format,
bos, mode_cmd->handles);
if (ret)
return ERR_PTR(ret);
fb = omap_framebuffer_init(dev, mode_cmd, bos);
if (IS_ERR(fb)) {
int i, n = drm_format_num_planes(mode_cmd->pixel_format);
for (i = 0; i < n; i++)
drm_gem_object_unreference_unlocked(bos[i]);
return fb;
}
return fb;
}
struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
{
struct omap_framebuffer *omap_fb;
struct drm_framebuffer *fb = NULL;
const struct format *format = NULL;
int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
dev, mode_cmd, mode_cmd->width, mode_cmd->height,
(char *)&mode_cmd->pixel_format);
for (i = 0; i < ARRAY_SIZE(formats); i++) {
if (formats[i].pixel_format == mode_cmd->pixel_format) {
format = &formats[i];
break;
}
}
if (!format) {
dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
(char *)&mode_cmd->pixel_format);
ret = -EINVAL;
goto fail;
}
omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
if (!omap_fb) {
dev_err(dev->dev, "could not allocate fb\n");
ret = -ENOMEM;
goto fail;
}
fb = &omap_fb->base;
ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
if (ret) {
dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
goto fail;
}
DBG("create: FB ID: %d (%p)", fb->base.id, fb);
omap_fb->format = format;
for (i = 0; i < n; i++) {
struct plane *plane = &omap_fb->planes[i];
int size, pitch = mode_cmd->pitches[i];
if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
pitch, mode_cmd->width * format->planes[i].stride_bpp);
ret = -EINVAL;
goto fail;
}
size = pitch * mode_cmd->height / format->planes[i].sub_y;
if (size > (bos[i]->size - mode_cmd->offsets[i])) {
dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
bos[i]->size - mode_cmd->offsets[i], size);
ret = -EINVAL;
goto fail;
}
plane->bo = bos[i];
plane->offset = mode_cmd->offsets[i];
plane->pitch = pitch;
plane->paddr = 0;
}
drm_helper_mode_fill_fb_struct(fb, mode_cmd);
return fb;
fail:
if (fb) {
omap_framebuffer_destroy(fb);
}
return ERR_PTR(ret);
}
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